Changes in the fine structure of the parietal yolk sac of the rat placenta with increasing gestational age.
D000818:Animals; D004721:Endoplasmic Reticulum / Q000166:cytology; D005260:Female; D005293:Ferritins / Q000502:physiology; D005333:Fetus; D005865:Gestational Age; D008431:Maternal-Fetal Exchange / Q000502:physiology; D008854:Microscopy, Electron; D010920:Placenta / Q000166:cytology*; D011247:Pregnancy; D051381:Rats; D012270:Ribosomes / Q000166:cytology; D013911:Thorium Dioxide / Q000502:physiology; D014327:Trophoblasts / Q000166:cytology
D005293:Ferritins; D013911:Thorium Dioxide